Single molecule techniques comprise a set of experimental methods that detect, manipulate, and analyze individual biomolecules or molecular complexes, circumventing ensemble averaging and revealing heterogeneity in structure, dynamics, and function. Core modalities include single-molecule fluorescence (e.g., smFRET, TIRF microscopy), optical and magnetic tweezers, atomic force microscopy, and nanopore-based sensing. These techniques enable direct measurement of forces, conformational changes, binding/unbinding events, and reaction pathways with nanometer spatial and millisecond (or better) temporal resolution. They are widely applied to study nucleic acid–protein interactions, molecular motors, enzyme kinetics, folding energy landscapes, and mechanotransduction at the level of individual molecules.
It plays a fundamental role in human existence and is a major component of our universe, yet there are still things we don't understand about water. To address the knowledge gaps, a collaborative team of Institute of Industrial ...
Nanophysics
Jan 6, 2022
0
1518
Researchers in Japan have designed the first bottom-up designed peptides, comprising chains of amino acids, that can form artificial nanopores to identify and enable single molecule-sorting of genetic material in a lipid ...
Bio & Medicine
Nov 24, 2021
0
192
As devices continue to shrink, new challenges in their measurement and design present themselves. For devices based on molecular junctions, in which single molecules are bound to metals or semiconductors, we have a variety ...
Nanomaterials
Nov 17, 2021
0
133
The potential of DNA structural properties in single-molecule electronics has finally been harnessed by researchers from Tokyo Institute of Technology (Tokyo Tech) in a single-molecule junction device that shows spontaneous ...
Nanomaterials
Nov 2, 2021
0
118
Flip through any chemistry textbook and you'll see drawings of the chemical structure of molecules—where individual atoms are arranged in space and how they're chemically bonded to each other. For decades, chemists could ...
Nanophysics
Oct 29, 2021
0
446
As scientists have probed the mysteries of life down to smaller and smaller scales, they have invented tools to help them understand what they observe. Determining the identity of DNA and RNA molecules has now become commonplace ...
Bio & Medicine
Oct 21, 2021
0
88
Researchers from the technical universities of Delft and Munich have invented a new type of molecular trap that can hold a single protein in place for hours to study its natural behavior—a million times longer than before. ...
Bio & Medicine
Aug 31, 2021
0
258
Being able to detect DNA from a single cell is important for the detection of diseases and genetic disorders. Measuring single DNA molecules has been possible for some time; however, directly detecting samples at the point ...
Bio & Medicine
Aug 24, 2021
0
281
At the simplest of levels, nanopores are (nanometre-sized) holes in an insulating membrane. The hole allows ions to pass through the membrane when a voltage is applied, resulting in a measurable current. When a molecule passes ...
Nanomaterials
Aug 19, 2021
0
88
Based on the principle of interaction between matter and light, a new method has been developed to track and observe the Brownian motion of fast-moving nanometer-sized molecules, and measure the different fluorescence signals ...
Nanomaterials
Jul 27, 2021
0
667
